preventives
pre-ven-tives
noun
Measures or substances used to stop something undesirable occurring.
"Many people take preventives to avoid catching colds."
Thesaurus
Synonyms: pre-emptive, obstructive, preemptive, hindering, preventive, frustrative, clogging, prohibitory, impeding, preclusive, deterrent, blockading
Antonyms: permissive